How far is the nearest black hole from the earth?

European astronomers have discovered the nearest black hole to the earth, and they can also observe two stars dancing with it.

Of course, on the galactic scale, proximity is relative. This black hole is about 65,438+0,000 light years away, and each light year is 5.9 trillion miles (9.5 trillion kilometers).

Thomas, a European astronomer, said that the nearest black hole in the past may be about three times as long as it is now, about 3200 light years away, but in terms of the universe and even galaxies, they are all very close to us.

Astronomers used telescopes in the southern hemisphere to find a closer black hole, which shows that there are more black holes there. They speculate that there are about 1 billion to 1 billion such small and dense objects in the Milky Way.

The problem is that we can't see them. Nothing, not even light, can escape the gravity of a black hole. Usually, scientists can only find companion stars when they devour some parts or other things fall into them. Astronomers believe that most black holes, including this newly discovered black hole, are not close enough to be swallowed up. So they won't be found.

Astronomers found this black hole because it has an unusual star orbit, and the orbit of the inner star is distorted.

They used telescopes in Zhizhi to confirm that the mass of the inner star is about four to five times that of the sun. They decided that it could only be a black hole. Like most such black holes, black holes are very small and may be 25 miles (40 kilometers) in diameter. '

Compared with our sun 4.6 billion years ago, black holes are young hot stars. Their age is about 65438+400 million years old, but at 26000 degrees Fahrenheit (15000 degrees Celsius), their temperature is three times that of the sun. About/kloc-0.5 million years ago, one of the stars became too big and too hot to become a supernova, and became a black hole in the violent process.

As Avi Loeb, director of the Harvard Black Hole Project, said, "The most likely black hole is much closer than this." "If you find an ant while scanning a small part of the kitchen, you will know that there are more."